======================================
| [   24.797128][  T232] 1 lock held by setsockopt-clos/232:
| [ 24.797488][ T232] #0: ffff888004aa9e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   24.797791][  T232]
| [   24.797791][  T232] stack backtrace:
[   24.798243][  T232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.798563][  T232] Call Trace:
[   24.798681][  T232]  <TASK>
[ 24.798761][ T232] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.798918][ T232] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.799068][ T232] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 24.799216][ T232] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 24.799371][ T232] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 24.799552][ T232] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 24.799702][ T232] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 24.799847][ T232] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 24.799992][ T232] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 24.800104][ T232] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 24.800277][ T232] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.800432][ T232] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 24.800576][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.800724][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.800867][ T232] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.801014][ T232] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 24.801157][ T232] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.801279][ T232] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.801423][ T232] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 24.801570][ T232] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 24.801724][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.801869][ T232] ? inode_update_timestamps (fs/inode.c:2649 fs/inode.c:2662 fs/inode.c:1997) 
[ 24.802016][ T232] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.802163][ T232] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 24.802313][ T232] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.802428][ T232] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 24.802573][ T232] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 24.802717][ T232] ? ktime_get_coarse_real_ts64 (./include/linux/seqlock.h:74 kernel/time/timekeeping.c:2390) 
[ 24.802902][ T232] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 24.803045][ T232] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 24.803189][ T232] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 24.803304][ T232] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.803460][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.803610][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.803754][ T232] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.803898][ T232] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.804040][ T232] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 24.804184][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.804331][ T232] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.804475][ T232] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.804620][ T232] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 24.804774][ T232] do_sock_getsockopt (net/socket.c:2396) 
[ 24.804919][ T232] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 24.805066][ T232] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 24.805218][ T232] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 24.805333][ T232] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 24.805488][ T232] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 24.805632][ T232] ? fput (./arch/x86/include/asm/atomic64_64.h:61 ./include/linux/atomic/atomic-arch-fallback.h:4404 ./include/linux/atomic/atomic-long.h:1571 ./include/linux/atomic/atomic-instrumented.h:4540 fs/file_table.c:482) 
[ 24.805743][ T232] ? ksys_write (./include/linux/file.h:69 ./include/linux/file.h:85 fs/read_write.c:739) 
[ 24.805886][ T232] ? __pfx___sys_socket (net/socket.c:1712) 
[ 24.806032][ T232] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 24.806179][ T232] __x64_sys_getsockopt (net/socket.c:2432) 
[ 24.806322][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.806499][ T232] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.806645][ T232] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.806823][  T232] RIP: 0033:0x7fb1ce9b546e
[ 24.806978][ T232] Code: 1f 44 00 00 48 8b 15 91 99 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb b8 0f 1f 44 00 00 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 59
All code
========
   0:	1f                   	(bad)
   1:	44 00 00             	add    %r8b,(%rax)
   4:	48 8b 15 91 99 0a 00 	mov    0xa9991(%rip),%rdx        # 0xa999c
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
  15:	eb b8                	jmp    0xffffffffffffffcf
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 37 00 00 00       	mov    $0x37,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	59                   	pop    %rcx

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	59                   	pop    %rcx
[   24.807482][  T232] RSP: 002b:00007ffcae070b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   24.807699][  T232] RAX: ffffffffffffffda RBX: 00007ffcae070cf0 RCX: 00007fb1ce9b546e
[   24.807913][  T232] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   24.808130][  T232] RBP: 00007ffcae070b70 R08: 00007ffcae070b6c R09: 0000000000000064
[   24.808345][  T232] R10: 00007ffcae070b70 R11: 0000000000000246 R12: 0000000000000009
[   24.808559][  T232] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   24.811478][  T232] 1 lock held by setsockopt-clos/232:
| [ 24.811625][ T232] #0: ffff888004aac898 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   24.811921][  T232]
| [   24.811921][  T232] stack backtrace:
[   24.812341][  T232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.812653][  T232] Call Trace:
[   24.812765][  T232]  <TASK>
[ 24.812844][ T232] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.812991][ T232] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.813139][ T232] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1905 (discriminator 7)) 
[ 24.813290][ T232] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 24.813438][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.813598][ T232] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 24.813748][ T232] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 24.813894][ T232] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 24.814038][ T232] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.814190][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.814335][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.814475][ T232] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 24.814617][ T232] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.814759][ T232] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 24.814900][ T232] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 24.815046][ T232] do_sock_setsockopt (net/socket.c:2334) 
[ 24.815196][ T232] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 24.815359][ T232] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 24.815473][ T232] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 24.815618][ T232] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 24.815759][ T232] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 24.815904][ T232] ? __pfx___sys_socket (net/socket.c:1712) 
[ 24.816047][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.816228][ T232] __x64_sys_setsockopt (net/socket.c:2363) 
[ 24.816375][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.816551][ T232] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.816697][ T232] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.816873][  T232] RIP: 0033:0x7fb1ce9b591e
[ 24.817022][ T232] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   24.817520][  T232] RSP: 002b:00007ffcae070e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   24.817734][  T232] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1ce9b591e
[   24.817946][  T232] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   24.818158][  T232] RBP: 0000000000000009 R08: 0000000000000450 R09: 0000000000000000
[   24.818369][  T232] R10: 00007ffcae070f10 R11: 0000000000000246 R12: 0000000000000027
[   24.818586][  T232] R13: 0000000000000000 R14: 00007ffcae070f10 R15: 000000000041069c
| [   24.847013][  T232] 1 lock held by setsockopt-clos/232:
| [ 24.847158][ T232] #0: ffff888006839098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   24.847472][  T232]
| [   24.847472][  T232] stack backtrace:
[   24.847898][  T232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   24.848210][  T232] Call Trace:
[   24.848327][  T232]  <TASK>
[ 24.848405][ T232] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.848560][ T232] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 24.848721][ T232] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 24.848873][ T232] tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1698) 
[ 24.849022][ T232] ? __pfx_tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1597) 
[ 24.849167][ T232] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 24.849350][ T232] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 24.849515][ T232] ? do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 24.849658][ T232] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 24.849804][ T232] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 24.849948][ T232] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 24.850110][ T232] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 24.850261][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 24.850408][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 24.850553][ T232] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 24.850697][ T232] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 24.850839][ T232] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 24.850982][ T232] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 24.851135][ T232] do_sock_setsockopt (net/socket.c:2334) 
[ 24.851280][ T232] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 24.851435][ T232] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 24.851561][ T232] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 24.851717][ T232] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 24.851877][ T232] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 24.852034][ T232] ? __pfx___sys_socket (net/socket.c:1712) 
[ 24.852181][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.852362][ T232] __x64_sys_setsockopt (net/socket.c:2363) 
[ 24.852510][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 24.852711][ T232] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 24.852856][ T232] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   24.853033][  T232] RIP: 0033:0x7fb1ce9b591e
[ 24.853187][ T232] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   24.853694][  T232] RSP: 002b:00007ffcae071118 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
[   24.853929][  T232] RAX: ffffffffffffffda RBX: 00000000000001b4 RCX: 00007fb1ce9b591e
[   24.854149][  T232] RDX: 0000000000000026 RSI: 0000000000000006 RDI: 0000000000000009
[   24.854365][  T232] RBP: 0000000000000009 R08: 0000000000000120 R09: 0029383231736561
[   24.854580][  T232] R10: 00007ffcae071250 R11: 0000000000000206 R12: 0000000000001108
[   24.854799][  T232] R13: 0000000000000001 R14: 0100000000000000 R15: 00005402b80d0120
| [   25.339354][  T232] 1 lock held by setsockopt-clos/232:
| [ 25.339500][ T232] #0: ffff8880079e9e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.339799][  T232]
| [   25.339799][  T232] stack backtrace:
[   25.340237][  T232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.340574][  T232] Call Trace:
[   25.340686][  T232]  <TASK>
[ 25.340764][ T232] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.340920][ T232] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.341085][ T232] tcp_ao_established_key (net/ipv4/tcp_ao.c:117 (discriminator 7)) 
[ 25.341242][ T232] tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1860) 
[ 25.341396][ T232] ? __pfx_tcp_ao_del_cmd (net/ipv4/tcp_ao.c:1813) 
[ 25.341556][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.341718][ T232] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.341871][ T232] do_tcp_setsockopt (net/ipv4/tcp.c:3943) 
[ 25.342040][ T232] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.342182][ T232] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.342336][ T232] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.342510][ T232] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.342665][ T232] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.342814][ T232] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.342974][ T232] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.343128][ T232] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.343276][ T232] do_sock_setsockopt (net/socket.c:2334) 
[ 25.343420][ T232] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.343595][ T232] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.343712][ T232] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.343859][ T232] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.344020][ T232] ? __sys_socket (net/socket.c:496 net/socket.c:1725) 
[ 25.344180][ T232] ? __pfx___sys_socket (net/socket.c:1712) 
[ 25.344329][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.344520][ T232] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.344663][ T232] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.344841][ T232] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.344991][ T232] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.345170][  T232] RIP: 0033:0x7fb1ce9b591e
[ 25.345321][ T232] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   25.345827][  T232] RSP: 002b:00007ffcae070fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   25.346074][  T232] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1ce9b591e
[   25.346301][  T232] RDX: 0000000000000027 RSI: 0000000000000006 RDI: 0000000000000009
[   25.346550][  T232] RBP: 0000000000000009 R08: 0000000000000090 R09: 0000000000000002
[   25.346772][  T232] R10: 00007ffcae071090 R11: 0000000000000246 R12: 0000000000000027


Finger prints:
lockdep_rcu_suspicious:tcp_ao_del_cmd:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt
lockdep_rcu_suspicious:tcp_ao_add_cmd:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt
lockdep_rcu_suspicious:tcp_ao_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt
lockdep_rcu_suspicious:tcp_ao_established_key:tcp_ao_del_cmd:do_tcp_setsockopt:do_sock_setsockopt